Chair for concrete-reenforcing rods



Jan. 4, 1927.

A. E. KLINGER ET AL CHAIR FOR CONCRETE REENFORCING RODS 1,613,351 Jan' 4 1927 A. E. KLINGER ET A.

CHAIR FOR CONCRETE REENFORCING RODS Filed May 51. 1924 2 sheets-@shawu 2 Patented Jan. 4, 1.927.

UNITED STATES PATENT oFFlcE.

AUGUST E. KLINGER, OF TONAWANDA, AND FREDERICK C. BURKHARDT, OF BUFFALO, NEW YORK, ASSIGNORS TO BUFFALO STEEL COMPANY, OF TONAWANDA, NEW YORK, A CORPORATION OF NEW YORK, AND THE CROSBY COMPANY, OF BUFFALO, NEW YORK, A CORPORATION 0F NEW YORK.

CHAIR FOR CONCRETE-REENFORCING RODS.

Application filed May 31, 1924. Serial No. 717.082.

This invent-ion relates to a chair which is more particularly designed for supporting rods or bars used in reenforcing concrete pavements', although the same may also be used in other installations where similar conditions exist, for instance in laying a concrete iioor of a building which is to be reenforced with metal rods or bars.

It is the object of this invention to provide a chair of this character which isfcomparatively simple in construction, which can be produced at low cost and which can be readily and conveniently used for reliably supporting the reentorcing rods in various numbers and in different angular relation to each other as well as permitting of supporting a plurality of sets of such rods or bars one above the other.

In the accompanying drawings:

Figure 1 is a top plan view showing a reentorcement for a concrete pavement floor or the like made up ot a plurality of bars arranged at right angles to each ot-her and supported by chairs embodying our improvements.

Figure 2 is a perspective view of a chair constructed in accordance with our invention and showing a pair of lower and a pair ot upper reenforcing rods or bars mounted on this chair. y

Figure-3 is a side elevation of this im proved chair showing the condition of the same before the reenforcing rods or bars are mounted thereon.

Figure 4 is a front elevation thereof.

Figure 5 is a Vertical longitudinal section, taken on line 5 5, Figure 4.

Figure 6 is a to plan View of this chair.

Figure 7 is a ragmentary side elevation of the lower part of the chair, showing the manner in which two reenforcing rods are mounted on .this chair in the position at right angles to each other.

Similar characters of reference indicate like parts in the corresponding views.

Although this chair may be variously constructed for the purpose of supporting reenforcing rods or bars in a variety of ways best suited for the articular job of concrete which is to be reen orced, the particular construction of chair which is shown in the drawings is designed to support an upper and a.l lower set of rods or bars one above the other, the lower set in this particular in stance comprising lower and upper rods 10 land 11 which are'so arranged that an upper rod of each lower set crosses an adjacent lower rod ot the same set at`r1ght angles` thereto, and the upper set also being composed of a plurality o1 lower rods 12, and a plurality ot upper rods or bars 13, each of which crosses one ot the lower rods of the upper set at right'l angles thereto. .Each crossing between two adjacent rods of the upper set is arranged vertically in line with a crossing between two bars of a lower set and at these companion crossings between the two pairs ot bars of an upper and lower set ot such rods, these rods are supported by a chair whichv embodies our invention and which in its preferred form is constructed as follows: j

The numeral 14" represents a horizontal flat base which is fadapted to rest upon the foundation of the road which is to be covered with a'concrete pavement or the bottom of a cellar or other surface which is to be covered over with concrete. Projecting upwardly from one end of this base is a standard which is generally of channel shaped or U form in horizontal section and comprises an upright transverse web 15 which is connected at its lower end by a downwardly widening'portion 19 with the front end of the base 14, and two upright longitudinal flanges 16 which project inwardly from opposite vertical edges ot the web 15 and each ot which merges at its lower end by means of a curved and downwardly narrowing portion 17 into the transverse front portion of the base 14. j

kAdjacent to its'lower end the web of the standard has a lip 18 stamped outwardly from the stock of this web so that the lower end of this lip remains attached to the web While the upper end thereof is disconnected therefrom. Adjacent to the li 18 the front edges of the side 'flanges 16 o the standard are provided with upwardly opening notches 20 which together with the inner side of the respective lip` 18 are adapted to forma seat for one ot the lower transverse reenforcing rods 10 yot the lower set of rods. This rod 10 is engaged with this seat while the lip 18 is in an outwardly bent" position, as shown in Figures 3, 4 and 5, and after this rod is inserted in this seat it is confined therein by bending the upper end of the lip 18 inwardly and over the upper sidev of the rod 1() and between the a 'acent parts of the longitudinal flanges 16 o the standard, as shown in Figures 2 and 7. The removalof the stock from the lower part of the web of the standard by the :formation of the lip 18 reduces an opening in this web above this ip which opening, if'desired, may be further increased by bending that portion of the web of the Standard immediately above the lower lip 18 outwardly so as to form an upper lip 21. Through this opening is pased one of the longitudinal upper reenforcing rods or bars 11 of the lower set so that this rod rests on top of the lower lip 18 after the same has been bent over the rod 10. The upper rodll is arranged between the side flanges 16 of the standard and is held against displacement thereon by bending the lip 21 downwardly against the upper side ot' the rod 11 after the parts have been assembled, as shown in Figures 2 and 7. Adjacent to its upper end the .web 15 of the standard has another upwardly projecting lip 22 bent outwardly therefrom so that this lip remains attached at its lower end to the web while its upper end. is detached therefrom, and adjacent portions of the front edges of the flanges 16 are provided with notches 23 which together with the lip 22 form a transverse seat. This seat is adapted to receive one of the lower transverse rodsl or bars 12 of the upper set which rod after being engaged with this seat is retained therein by bending the upwardly projecting lip 22 inwardly and over the top of the rod 12 and between the adjacent parts of the side flanges 16, as shown in Figures 1 and 2.

The removal of the stock from the upper front part of the web 15 in the formation of the upwardly projecting upper lip 22 forms an opening between the side flanges 16 immediately above the lip 22. Into this opening is placed one of the longitudinal reenforcing rods or bars 13 of the upper set so that the same rests with its underside on top of the lip 22 and is confined between the upper parts of the flanges 16. Displacement of this u per rod 13 from this position is prevente by bending the upper ends 24, 24 of the flanges 16 inwardly and downwardly into engagement with the to of the rod 13 from opposite sides thereo as shown in Figures 1 and 2.

When the several chairs are thus connected with the`upper and lower sets of reenforcing bars or rods, the same are reliablyr held in their proper relative position which they should occupy in the mass of concrete which is subsequently poured over the same to completely embed the chairs and reenforcing rods.

In the manufacture of these chairs each one is constructed from a single piece of sheet metal of a width equal to the Width of the base, this piece being left in its full width condition at one end to form the base. portion of thechair and form a bearing contact for the chair on the foundation which isl of comparatively large area, while the opposite `end of the sheet metal blank, from which the chair is constructed, is bent upwardly and into channel shape and the openings and retaining lips are cut and bent out of the web thereof and the upper ends of the flanges so that practically all of the metal originally present in the blank 1s utilized in the finished chair, the only waste consisting of the metal which is removed from the side flanges in the formation of the notches 20 and 23.

Owing to the simplicity in the construction of this chair and the ease with which the same can be manufactured, it is possible to produce the same at comparatively 'low cost.

Furthermore. this chair owing to its one r p1ece construction avo1ds the use of any separate parts, such as bolts, rivets, or clips for attaching the reenforcing rods or bars thereto, therebv facilitating the mounting of the reenforcing rods or bars thereon and also avoiding loss of parts.

Although-,the drawings represent this chair as used in connection with reenforcing rods or bars which are round in crocs section, obviously this chair is capable of use in connection with any other form of reenforcing` rods or bars such as those nw commonlv used for reenforcing concrete.

We claim as our invention: 1. A chair for supporting a concrete reenforcing rod comprlsin a horizontal flat base, and a standard rising from said base and having an upright webconnected at its lower end with one end of the base and upright flanges arran ed on opposite vertical edges of said web t ereby forming a standard which is U-shaped in horizontal section, and said web having a seat upon which a reenforcing rod is adapted to rest.

A 2. A chair for supporting a concrete reenforcin rod comprlsin a horizontal flat base, an a standard rismg from said base and having an upright web connected at its lower end with one end of the base and upri ht flanges arranged on opposite vertical e ges of said web, and said web having a seat upon which a reenforcing rod is adaptedto rest, and each of said flanges merging gt its lower end into the adjacent end of said ase.

3. A chair for supporting a concrete reenforcing rod comprising a horizontal flat base, and a standard of channel form in horizontal section rising from said base and having a lip struck out of its web which projects upwardly and is adapted to form a seat for a rod and to be bent with its upper end against the samef'or confining it thereon.

Y 4. A chair for supporting a concrete reenforcing rod coniprisinor a horizontal Hat base, and a standard o'channel form in horizontal section rising from said'base and having a lip struck out of its web which projects upwardly Iand is adapted .to -form aseat for a rod 'and to be bent Awith its upper end against the same for confining itthereon, and the parts of the flanges adjacent to saidlip being provided withI notches which receive the rod resting on said lip.

5. A chair for supporting -a concrete reenforcing rodcomprising va horizontal flat base, and a standard of channel form in horizontal section rising from said base and having a lip v'struck out of its web whichprojects upwardly and is adapted to form a seat for a rod and to he bent with its upper endagainst the lsame for confining it. thereon, the opening formed'in said web b the deflection of the stock of said lip eing Aada tedto receive a reenforcing rod at rightang es to the first mentioned rod.

6. A chair for supporting a concrete reenforcin rod comprisin a. horizontal flat base, an a standard o channel form in horizontal section rising 'from said base and having a lip struck out of its webA which projects upwardly and is adapted to form a seat for a rod and to be bent with its upper end against the same for confining itthereon,

the opening. formed in said web by the de' flection of the stock of'said lip being adapt'- ed to receive a reenforcing rod at right angles to the first mentioned rod', and the upper edge of said opening having a de-` pending lip formed by the stock of said web and adapted to be bent against the upper 'side ofthe last mentioned reenforcing rod.

7. A chair for supporting a concrete reenforcing rod comprising a horizontal fiat base, and a standard of channel lform in horizontal section rising from saidbase and having a lip struck out of its -web which projects upwardly and is adapted to form a seat for a rod and to be bent-with its upper end against the same for confining it thereon, the opening formed in said. web b the deflection of the stock of said lip emg adapted to receive a reenforcing rod ary ranged at right angles to the first mentioned rod, and the parts of said flanges adjacent to said lip being adapted to bend against the last mentioned rod. A e

8. A chair for supporting concrete reenforoing rods comprising a flat horizontal base adaptedto rest on a foundation, a standard of channel shape in horizontal seotion rising from said base and having up er and lower retaining means for supporting two pairs .of cross rods,"the members of one pair being arranged above the members of the oth'r pair, said channel shape stand-v ard having an upright web and upright flangs projecting inwardl from opposite upright edges of said we said lower retaining means comprising an upwardly projecting lower lip struck out of the lower Formed by aA apted to be (lll bent against the upper side ofthe .upper v rod of the lower pair2 and said upper re taining means comprising an u wardly projecting lip struck out of said we and adapted to form a seat for the lower rod of the upper air and to be'bent against the. latter, an the open-in formed -in s aid web by the deflection there rom of the stock of said last mentioned lip, which opening is adapted to receive the upper rod of the upper pair, and the upper ends of said flanges adapted to be b'ent against the upper rod of the upper pair for holding the same in place. A

AUGUST EQKLINGER. FREDERICK o. BURKHARDT. 

